Question

A toy rocket was launched from the ground. The function f(x) = -16x2 + 192x shows the height of the rocket f(x), in feet, from the ground at time x seconds.
What is the axis of symmetry of the graph of f(x) and what does it represent?

Answer 1

1) x = 12; it takes 12 seconds to reach the maximum height and 12 seconds to fall back to the ground
2) x = 12; it takes 12 seconds to reach the maximum height and 24 seconds to fall back to the ground
3) x = 6; it takes 6 seconds to reach the maximum height and 6 seconds to fall back to the ground
4) x = 6; it takes 6 seconds to reach the maximum height and 3 seconds to fall back to the ground